Merit Brass K617H-20 Pipe Hex Plug 1-1/4 in 316 Ss Mnpt

Product Description

The MERIT BRASS K617H-20 is a 1-1/4 inch hex plug designed to close off open pipe ends in threaded piping systems. Machined from 316 stainless steel, it offers strong resistance to corrosion, oxidation, and chloride-rich environments. The male NPT (MNPT) thread connection seats securely into any standard female NPT port. Rated at 150 psi, this plug is well suited for piping systems that carry water, mild chemicals, or process fluids where material integrity is critical. Plumbers, pipefitters, and industrial maintenance technicians install this type of fitting during system commissioning, pressure testing, or line isolation.

This hex plug is used in residential, commercial, and light industrial piping applications where a threaded pipe end must be sealed. The 316 stainless steel construction makes it a preferred choice for corrosive or sanitary environments, including food service, chemical processing, marine installations, and coastal plumbing systems. The hex head profile allows standard wrench engagement for reliable installation torque without the need for specialty tools.

Key Features

• 316 stainless steel construction for corrosion and oxidation resistance
• 1-1/4 inch MNPT threaded connection for standard pipe fitment
• 150 psi pressure rating suitable for low-to-medium pressure systems
• Hex head drive allows engagement with standard open-end or adjustable wrenches
• Meets ISO standards for dimensional consistency
• Compact, single-piece design with no internal components to fail

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/4 inch female NPT threaded pipe ports in 150-class threaded piping systems.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters working under applicable IPC or ASME B31 piping codes. Shut off and depressurize the line completely before removing any existing fitting or installing this plug. Apply an appropriate thread sealant or PTFE tape to the male threads before seating to ensure a pressure-tight connection. Do not overtighten — use a wrench on the hex flats only; do not use pipe wrenches on the hex body faces.